import fetch from 'isomorphic-fetch';
import { Notification, MessageBox } from 'element-ui';
import store from '../modules/app_store'

const codeMessage = {
    200: '服务器成功返回请求的数据。',
    201: '新建或修改数据成功。',
    202: '一个请求已经进入后台排队（异步任务）。',
    204: '删除数据成功。',
    400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
    401: '用户没有权限（令牌、用户名、密码错误）。',
    403: '用户得到授权，但是访问是被禁止的。',
    404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
    406: '请求的格式不可得。',
    410: '请求的资源被永久删除，且不会再得到的。',
    422: '当创建一个对象时，发生一个验证错误。',
    500: '服务器发生错误，请检查服务器。',
    502: '网关错误。',
    503: '服务不可用，服务器暂时过载或维护。',
    504: '网关超时。',
};

function checkStatus(response) {

    if (response.status >= 200 && response.status < 300) {
        return response;
    }
    Notification.close();
    try {
        if (response.json) {
            response.json().then(x => {
                Notification.error({
                    title: "请求错误",
                    message: x.Message,
                });
            })
        }
        if(response.status==401){
            location.hash = `/login/admin`;
        }
    } catch (ex) {
        const errortext = codeMessage[response.status] || response.statusText;
        Notification.error({
            title: "请求错误",
            message: `${response.status}: ${response.Message}`,
        });
        const error = new Error(errortext);
        error.name = response.status;
        error.response = response;
        throw error;
    }

}

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [options] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default function request(url, options) {
    const defaultOptions = {
        credentials: 'include',
        mode: "cors"
    };
    //   const { dispatch } = store;
    const newOptions = { ...defaultOptions, ...options };
    if (newOptions.method === 'POST' || newOptions.method === 'PUT') {
        if (!(newOptions.body instanceof FormData)) {
            newOptions.headers = {
                Accept: 'application/json',
                'Content-Type': 'application/json; charset=utf-8',
                ...newOptions.headers,
            };
            newOptions.body = JSON.stringify(newOptions.body);
            // newOptions.headers = {
            //   'Accept': '*/*',
            //   'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8',
            //   ...newOptions.headers,
            // };
            // newOptions.body = stringify(newOptions.body);
        } else {
            // newOptions.body is FormData
            newOptions.headers = {
                Accept: 'application/json',
                ...newOptions.headers,
            };
        }
    }

    return fetch(url, newOptions)
        .then(checkStatus)
        .then(response => {
            // if (newOptions.method === 'DELETE' || response.status === 204) {
            //   return response.text();
            // }
            return response.json();
        })
        .then(json => {
            if (json.code === 20007) {
                store.getters["global/login_name"].then(x => {
                    if (x) {
                        location.hash = `/login/${x}`;
                    } else {
                        location.hash = `/error404`;
                    }
                });

            }
            return json;
        })
        .catch(e => {
            const status = e.name;
            if (codeMessage[status]) {
                return;
            }
            checkStatus({
                url: url,
                status: 503
            });
            return e;
        });
}
